indoctrined?

Of late, I have found myself amidst so many discussions regarding Christianity, or rather theology, which in one way or another affects one's faith. I cannot for the life of me understand how people can get (1) so worked up over meaningless dogma, and (2).... uh, yeah it's basically just (1).... Evidently when someone has been indoctrinated by a belief that did not originate in his or her own brain, he or she is more likely to become angry when the validity is brought into question...perhaps the inability to defend an argument is not always a sign of indoctrination, but it's a good clue.
I believe that there is very little evidence, which reveals the origins of a thought. In John 1:3 the Bible says, "Through Him all things were made; without Him nothing was made that has been made." This suggests that there is a lot more "common" divine inspiration that one may have once thought. Also, since creation, many things have been corrupted, which suggests that many thoughts have demonic influence as well. Just something to think about next time you get into a "meaningless" argument...